IEC 61097-13:2003

INTERNATIONAL IEC
STANDARD
61097-13
First edition
2003-05
Global maritime distress and safety
system (GMDSS) –
Part 13:
INMARSAT F77 ship earth station equipment –
Operational and performance requirements,
methods of testing and required test results
Reference number
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INTERNATIONAL IEC
STANDARD
61097-13
First edition
2003-05
Global maritime distress and safety
system (GMDSS) –
Part 13:
INMARSAT F77 ship earth station equipment –
Operational and performance requirements,
methods of testing and required test results
 IEC 2003  Copyright - all rights reserved
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– 2 – 61097-13  IEC:2003(E)
CONTENTS
FOREWORD . 3
1 Scope . 4
2 Normative references. 5
3 Definitions and abbreviations . 5
3.1 Definitions . 5
3.2 Abbreviations. 7
4 General and operational requirements . 8
4.1 General requirements . 8
4.2 Operational requirements for INMARSAT F77 SES . 8
5 Technical requirements.10
5.1 Pre-emption by distress calls (ship originated).10
5.2 Electromagnetic compatibility (EMC).11
5.3 Spurious emissions.11
5.4 Power supply.11
5.5 Excessive conditions .11
5.6 Power supply interruption .11
5.7 Interfaces .11
6 Methods of testing and required test results.12
6.1 General .12
6.2 Test using local distress button.14
6.3 Test using remote distress button .14
6.4 Operational tests (without pre-emption) .14
6.5 Operational tests (with pre-emption) .15
6.6 Power supply testing.21
6.7 Interface testing.21
Annex A (informative) Requirements relating to installation .22
Annex B (informative) Reception of maritime safety information (MSI).23
Annex C (informative) List of INMARSAT F77 type-approval tests .24
Bibliography.25

61097-13  IEC:2003(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS) –
Part 13: INMARSAT F77 ship earth station equipment –
Operational and performance requirements,
methods of testing and required test results
FOREWORD
1) The IEC (International Electrotechnical Commission) is a world wide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international co-operation on all questions concerning standardization in the electrical and electronic
fields. To this end and in addition to other activities, the IEC publishes International Standards. Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt
with may participate in this preparatory work. International, governmental and non-governmental organizations
liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61097-13 has been prepared by IEC technical committee 80:
Maritime navigation and radiocommunication equipment and systems.
The text of this standard is based on the following documents:
FDIS Report on voting
80/358/FDIS 80/370/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
2008-01. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 4 – 61097-13  IEC:2003(E)
GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS) –
Part 13: INMARSAT F77 ship earth station equipment –
Operational and performance requirements,
methods of testing and required test results
1 Scope
This part of IEC 61097 specifies the minimum operational and performance requirements,
technical characteristics, methods of testing and required test results for INMARSAT F77 ship
earth stations (SES), capable of transmitting and receiving distress and safety
communications, initiating and receiving distress priority calls and transmitting and receiving
general radiocommunications, using radiotelephony (voice), as required within Regulation
IV/10.1 and 14.1 of the 1988 amendments to the 1974 International Convention for the Safety
of Life at Sea (SOLAS), for use in the GMDSS.
The INMARSAT F77 is intended to meet the voice requirements of IMO Resolution A.888(21).
In order to meet the GMDSS carriage requirements of SOLAS in respect of receipt of
SafetyNET broadcasts and direct printing telegraphy, it is necessary to install a combined
INMARSAT C/EGC transceiver in addition to the INMARSAT F77 equipment. Annex B
provides more information. Since Class 1 INMARSAT A and B ship earth stations meet the
data requirement of GMDSS, although not necessarily those of MSC.130(75), the F77 cannot
necessarily be considered as a direct replacement for these ship earth stations.
This standard also takes into account the priority access (voice pre-emption) requirements of
IMO Resolution A.888(21).
This standard takes account of IMO Resolution A.694(17) to which is associated IEC 60945.
When a requirement in this standard is different from IEC 60945, the requirement in this
standard shall take precedence.
This standard incorporates the performance standards of IMO Resolution MSC.130(75) and
the clarifications of certain requirements in IMO performance standards for GMDSS
Equipment defined in IMO MSC Circular 862. It also incorporates the relevant ITU Radio
Regulations.
All text of this standard, whose wording is identical to that in the IMO SOLAS Convention
1974 as amended, IMO Resolutions and IMO MSC Circular 862, is printed in italics and the
Resolution or Recommendation and paragraph number indicated between brackets.
It is a requirement of INMARSAT Ltd that all INMARSAT F77 mobile earth station models be
type-approved by INMARSAT before they can be allowed access to the INMARSAT space
segment. This testing is designed to demonstrate that the equipment under test will be
compatible with the INMARSAT F77 system and will not cause interference to other satellite
users. It is recommended that approval authorities accept testing organized and supervised
by INMARSAT, which results in INMARSAT type approval, without additional testing other
than that defined in this standard.
It is also recommended that equipment manufacturers rationalize the test requirements of this
standard and those of INMARSAT before embarking on the approval process.
NOTE This standard does not incorporate the INMARSAT system requirements needed for INMARSAT type
approval. For these, the latest edition of “INMARSAT mini-M SDM Change Note No. 65” should be consulted. When
a requirement in this standard is different from one in the above-mentioned INMARSAT document, reference shall
be made to the most recent IMO and ITU applicable documents to resolve the difficulty.

61097-13  IEC:2003(E) – 5 –
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60945, Maritime navigation and radio communication equipment and systems – General
requirements – Methods of testing and required test results
IEC 61162 (all parts), Maritime navigation and radio communication equipment and systems –
Digital interfaces
IEC 61162-1, Maritime navigation and radio communication equipment and systems – Digital
interfaces – Part 1: Single talker and multiple listeners
ISO/IEC 17025, General requirements for the competence of testing and calibration
laboratories
IMO International Convention for the Safety of Life at Sea (SOLAS)
IMO Resolution A.694(17), General requirements for shipborne radio equipment forming part
of the Global Maritime Distress and Safety System (GMDSS) and for electronic navigational
aids
IMO Resolution A.888(21), Criteria for the provision of mobile-satellite communication
systems in the Global Maritime Distress and Safety System (GMDSS)
IMO Resolution MSC.130(75), Performance standards for INMARSAT ship earth stations
capable of two-way communications
IMO MSC Circular 862, Clarifications of certain requirements in IMO performance standards
for GMDSS Equipment
INMARSAT mini-M SDM Change Note No. 65
ITU Radio Regulations
3 Definitions and abbreviations
3.1 Definitions
For the
...